Test better, earn more.
Practical knowledge on user testing, UX and conversion — built for the DACH region and GDPR-compliant. Facts and sources instead of gut feeling.
How much traffic does an A/B test need?
The honest maths: why reliable A/B tests quickly require 30,000 visitors — with sources — and what actually works below that.
Read article → July 6, 2026 BasicsWhy analytics never tells you the why
Numbers show that users drop off — not why. The real abandonment reasons appear in no dashboard. Here is how to close the gap.
Read article → July 7, 2026 Conversion5 UX mistakes costing you revenue every day
Hidden costs, forced accounts, slow pages: the most expensive pitfalls with study evidence — and how to find each one.
Read article → July 7, 2026 MethodologyHow many testers do you really need?
5 per round uncover around 85% of the problems — but variance is high. The research behind the rule and the numbers per method.
Read article → July 7, 2026 PracticeSetting up a landing page comparison the right way
Two drafts, real people, a clear decision instead of gut feeling — the comparison test in six steps.
Read article → July 7, 2026 PrivacyGDPR-compliant user testing: the guide
Consent, recordings, data residency — the five duties with a checklist and primary sources, what matters in Germany.
Read article → July 7, 2026Want to be notified when new articles are published?
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